package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.converter.EmpConverter;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.*;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.Objects;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 进行md5加密，然后再进行比对
         password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void saveEmployee(EmployeeDTO employeeDTO) {
        duplicateEmpCheck(employeeDTO.getUsername());
        Employee employee = EmpConverter.EmployeeDtoToEmployee(employeeDTO);
        employeeMapper.addEmployee(employee);

    }

    /**
     * 使用姓名是否重复检查
     * @param username
     */
    private void duplicateEmpCheck(String username) {
        Employee employee = employeeMapper.getByUsername(username);
        if(!Objects.isNull(employee)){
            throw new DuplicateAddEmpException(username+MessageConstant.ALREADY_EXISTS);
        }
    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
       //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> employeePage = employeeMapper.pageQuery(employeePageQueryDTO);
        PageResult pageResult = new PageResult(employeePage.getTotal(),employeePage.getResult());
        return pageResult;
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
         employeeExistCheck(id);
//        Employee employee =new Employee();
//        employee.setId(id);
//        employee.setStatus(status);
        Employee employee = Employee.builder().status(status).id(id).build();
        employeeMapper.updateEmp(employee);

    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getEmpById(Long id) {
        Employee employee = employeeMapper.getEmployeeById(id);
        employee.setPassword("******");
        return employee;
    }

    /**
     * 员工编辑
     * @param employeeDTO
     */
    @Override
    public void updateEmp(EmployeeDTO employeeDTO) {
        Employee employee = EmpConverter.EmployeeDtoToEmployee(employeeDTO);
        employeeMapper.updateEmp(employee);
    }

    /**
     * id是否存在查询
     * @param id
     */
    private void employeeExistCheck(Long id) {
        Employee employee = employeeMapper.getEmployeeById(id);
        if (Objects.isNull(employee)) {
            throw new EmpNotExistException("id为"+id+"员工不存在，请询问相关人员后在查询");
        }
    }


}
